A technique for reducing the vibration and noise from hydrofoils subject to unsteady lift is examined experimentally. Since the unsteady lift is known to be concentrated in the leading edge vicinity, a single-stage vibration isolation mount is integrated into a hydrofoil near its leading edge to inhibit the leading edge-generated unsteady forces from being transmitted to the remainder of the foil and any structures coupled to it. A single layer of elastomer forms the mount and is used to isolate the leading 20% chord of the hydrofoil from the remainder of the structure. The hydrofoil is excited into vibration by turbulence from an upstream wake generator in a water tunnel facility. Compared to a nonisolated hydrofoil, vibration reductions up to in level are recorded on the portion of the hydrofoil isolated from the leading edge.
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e-mail: tab7@only.arl.psu.edu
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December 2006
Technical Papers
Hydrofoil Leading Edge Isolation for Vibration and Noise Reduction in Marine Systems
Timothy A. Brungart,
e-mail: tab7@only.arl.psu.edu
Timothy A. Brungart
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030
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Eric C. Myer,
Eric C. Myer
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030
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Dean E. Capone,
Dean E. Capone
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030
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Robert L. Campbell,
Robert L. Campbell
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030
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Howard L. Petrie
Howard L. Petrie
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030
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Timothy A. Brungart
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030e-mail: tab7@only.arl.psu.edu
Eric C. Myer
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030
Dean E. Capone
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030
Robert L. Campbell
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030
Howard L. Petrie
The Pennsylvania State University
, Applied Research Laboratory, PO Box 30, State College, PA 16804-0030J. Vib. Acoust. Dec 2006, 128(6): 772-777 (6 pages)
Published Online: July 5, 2006
Article history
Received:
January 27, 2006
Revised:
July 5, 2006
Citation
Brungart, T. A., Myer, E. C., Capone, D. E., Campbell, R. L., and Petrie, H. L. (July 5, 2006). "Hydrofoil Leading Edge Isolation for Vibration and Noise Reduction in Marine Systems." ASME. J. Vib. Acoust. December 2006; 128(6): 772–777. https://doi.org/10.1115/1.2346697
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